Method of constructing light fireproof building material.



No. 672,383-, Patented Apr. Hi..A l90l.

C. W. LUTHER.

METHOD 0 F CONSTRUCTING LIGHT FIREPROOF BUILDING MATEYHIAL.

(Application led Nov. 3, 1897.) (No Model.) 2 Shoah-Shoot I.

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u.A 672,383. y Patented Apr.v le, Ism.

c. w. LUTHER. METHOD 0F CONSTBUCTING LIGHT FIREPBOOF BUILDING MATERIAL.

(Aplicmon med Nov. s, 1897.) (N0 HMRI.) 2 Sheets-Sheet 2.

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CHRISTIAN WILHELM LUTHER, OF REVAL, RUSSIA.

METHOD 0F COIISTRUCTING LIGHT FIREPROOF BUILDING MATERIAL.

SPECIFICATION forming part'of Letters Patent No. 672,383, dated April 16, 1901.

Application filed November 3. 1897. Serial No. 657,271. (No model.)

T0 all whom t may concern:

Be it known that I, CHRISTIAN WILHELM LUTHER, a subject of the Czar of Russia, residing at Reval, Russia, have invented certain new and useful Improvements in Methods of Constructing Light Fireproof Building Material, (patented in Great Britain', No. 21,921, dated September 24, 1897,) of which the following is a' specification.

For the erection of buildings which shall be practically fire and water proof I use a building material consisting of three or more sheets of veneer cemented together with a waterproof cement and coated on one or both sides with a paint having the ingredients and A characteristics4 hereinafter specified.

The cement with which the gluing is done consists of a mixture of casein (eighty-live to sixty per cent.) or a substance similar to it, and slaked lime, fifteen to forty per cent., or any alkalic substance similar to it, and so much water that a cement is produced which `may be easily laid on with a brush. To this cement materials insoluble in water, and which do not in any way influence the characier of the cement may be added for cheapness. This cement after drying will be waterproof. Such veneer boards, composed ofdifferent layers of veneers cemented together with their fibers crossing, are much less combustible than ordinary boards. To make, however, these veneer boards still more Water and fire proof, they may be covered outside with a composition consisting of a mix-Y ture of the above-described cementiwith an addition of coal-tar, (according to the effect that has to be produced, from five to thirty per cent. of tar to the dry cement.) This outer coating is indicated in the drawings byl the thick line a. The addition of the tar has a direct disinfecting influence due to the phenol (carbolic acid) contained in it; but it has also an indirect preserving effect by diminishing the adhesion of water (when raining) and therefore vpreventing the free lime of the cement being washed out. The tar further communicates to the painting, (cement and tar,) when thoroughly dry, a certain elasticity, because it slightly softens in a very hot sun,and therefore prevents the paint from cracking. On the other hand, the waterproof cement prevents the tar when eX- posed to a high temperature from getting sticky or running off. The lime in the cement prevents the material being attacked by insects.

Such boards as above described are fireproof to that degree that a soldering-Haine of 1,000O to 1,200o Celsius directed to one side of a board of a thickness of about three-sixteenths of an inch will show itself on the other side of the board by this place being couverted into charcoal after an elapse of more than live minutes without the board catching re. The above-described boards are then nailed or screwed or riveted or fixed in some way to wooden or iron posts and rafters to form a building. To make it more flreproof, iron posts and rafters would be preferred. These might be chosen in any suitable shape. For instance, rolled l... shaped girders could have the veneer boards or panels, prepared as aforesaid, secured in the fianges, or may be fitted to overlap at the ends, where rivets are passed through them.

For paneled ceilings of rooms and passages the panels of various kinds of woods would be veryeiective n appearance, besides being substantially fireproof.

To render my invention clearer, I have .illustrated the construction of the material and certain applications thereof in the accompanying drawings, in which- Figures 1 to 3 show sectional views through the improved material and various modes of securing the same to one upright. Fig. 4c is a similar View showing the material secured in an'iron upright of special construction. Fig. 5 is a similar view showing the ends of Vthe material lapped and secured together.

shown in Fig. 2, and the material A is further secured by a bead D, which also affords an ornamental appearance.

In Fig. 1I the post IOO is of metal and H-shaped, the material A being secured between the flanges by bolts C. In Fig. 5 the ends of two pieces of the material A are shown overlapped and secured by bolts or rivets C, no post being needed. lIn Figs. 6 and 7 the material A is shown as eX- tending' from the base or flooring E to the eaves F, each slab or strip of material being secured in place by either of the methods shown in Figs. l to 5. The letter G at Fig. 7 indicates a panel of the material A, with a portion of two of the veneers or plies cutaway to show the direction of the grain of the wood. The roof is or may be also composed of the veneer strips nailed to the rafters in any suitable manner.

@rase What I claim, and desire to secure by Letters Patent, is-

As a new article of manufact-ure, a water and fire prooi` building material comprising zo Witnesses: l

OSCAR INGMAN, l LUDWIG JAB'MENTZ. 

